%% You should probably cite rfc4059 instead of this I-D.
@techreport{ietf-pkix-warranty-extn-04,
    number =    {draft-ietf-pkix-warranty-extn-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-pkix-warranty-extn/04/},
    author =    {Sue Pontius and Alice Sturgeon and Duane Linsenbardt},
    title =     {{Internet X.509 Public Key Infrastructure Warranty Certificate Extension}},
    pagetotal = 9,
    year =      2003,
    month =     nov,
    day =       18,
    abstract =  {This document describes a certificate extension to explicitly state the warranty offered by a Certificate Authority (CA) for the certificate containing the extension. This memo provides information for the Internet community.},
}